The results of temperature measurements for the closed
steady state are shown in Fig. 2. The ®gure presents the
readings of thermocouples placed in air (®lled circles) and
inside the walls (un®lled circles). The thermocouples are
shown at their positions, as in Fig. 1b. Near each thermo-
couple, its reading is listed. In order to eliminate the effect of
a changing temperature in the room, the differences between
the local temperatures and the ambient one are shown in the
®gures instead of the absolute temperature values.